package com.lagou.handler;

import com.lagou.boot.SimpleApplicationContextAware;
import com.lagou.request.RpcRequest;
import com.lagou.service.UserServiceImpl;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

/**
 * 自定义的业务处理器
 */
public class UserServiceHandler extends ChannelInboundHandlerAdapter {

    // 当客户端读取数据时,该方法会被调用
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {

        // 注意: 客户端将来发送请求的时候会传递一个参数: UserService#sayHello#are you ok
        // 1.判断当前的请求是否符合规则
        if (msg != null) {
            // 2.如果符合规则,调用实现类货到一个result
            RpcRequest rpcRequest = (RpcRequest)msg;
            UserServiceImpl service = (UserServiceImpl)SimpleApplicationContextAware.getBean(rpcRequest.getClassName());
            String result = service.sayHello(String.valueOf(rpcRequest.getParameters()[0]));
            // 3.把调用实现类的方法获得的结果写到客户端
            ctx.writeAndFlush(result);
        }

    }
}
